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Promoting Anaerobic Digestion by Algae-based Hydrochars in a Continuous Reactor by Fengbo Wang; Jing Wang; Zelong Li; Shuaijun Zan; Miaomiao Du is a Engineering article available to read on EtoBox.

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The microalgae and macroalgae-based hydrochars produced by hydrothermal carbonization were mainly used as biofuels, however, their application in anaerobic digestion (AD) was little known. This study investigated the effects of microalgae Chlorella-based hydrochar (HC-C) and macroalgae Laminaria-based hydrochar (HC-L) on a continuous AD reactor under different organic loading rates (OLR). The AD process stability of hydrochars supplemented reactors were performed well under the increase of OLR from 2.6 to 6.5 g COD/L/d, and HC-C and HC-L addition could significantly enhance the daily methane yield by 36.0% and 31.4%, respectively. Interestingly, the possible mechanisms of HC-C and HC-L on the enhanced AD were similar, namely increasing sludge granulation, promoting the Methanothrix relative abundance and key enzyme activities, and further facilitating potential direct interspecies electron transfer between methanogens and organic-degrading bacteria. This study provided an implication on the potential application of algae-based hydrochars in wastewater treatment and energy recovery.

Who reads Promoting Anaerobic Digestion by Algae-based Hydrochars in a Continuous Reactor?

Author

Fengbo Wang; Jing Wang; Zelong Li; Shuaijun Zan; Miaomiao Du

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0960-8524)

Published

2020

Language

EN

Field

Engineering (Physical Sciences)